E-Mail IMAGE: Progress in fuel cell technology will help us greatly reduce our use of fossil fuels to generate electricity, leading to less air pollution view more Credit: Chris LeBoutillier on Pexels Many efforts are being made worldwide to replace fossil fuels with greener alternatives. Hydrogen (H 2) is a promising option that is currently in the spotlight; it can be used to generate electricity in fuel cells with water generated as the only byproduct. However, the technology is not quite ready for commercialization because proton-exchange membrane fuel cells, the most widely studied type, suffer from high cost and stability issues.